Veiled Chiton (Placiphorella velata) — note the pink and white striped girdle surrounding the narrow plates — effective coloration for blending in with coralline algae.
And here's another Veiled Chiton living on the bottom of an abandoned urchin pit. This chiton is a little harder to see — it's very well camouflaged with tiny tube worms and dark algae growing on its plates. (To find it, look for the pink and white striped girdle.)
I first wrote about Veiled Chitons on 21 August 2012. To learn more about these remarkable carnivorous chitons (they trap amphipods!), review the post called "A veiled threat" here.
And it was fun for us to see this chiton:
A juvenile Gumboot Chiton (Cryptochiton stelleri). This individual was only ~8 cm (~3 inches) long. Although I have shown pictures of adult Gumboot Chitons and much smaller juveniles (~1 cm long, and ~2 cm long), we haven't seen many of this size. We were impressed with how flattened they appeared — but note that you can still see the eight hidden plates lined up along the center of the chiton (allowing you to identify this as a chiton, rather than part of the rock).
All photographs are from northern Sonoma County on 24 February 2017.